Question
Assertion: Use of ball bearing between two moving parts of a machine is a common practice.
Reason: Ball bearing reduces rolling friction and provides good stability.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Solution
A.
If both assertion and reason are true and reason is the correct explanation of assertion.
A bearing is a machine element that constrains relative motion to only the desired motion, and reduces friction between moving parts. The simplest form of bearing, the plain bearing, consist of a shaft rotating in a hole.
